'''
不用解释器执行代码，请说出下面语句执行后的结果
string = "Python is good"
1. string[1:20]        #ython is good
2. string[20]       #报错
3. string[3:-4]     #hon is 
4. string[-10:-3]   #on is g
5. string.lower()   #python is good
6. string.replace("o", "0")   #"Pyth0n is g00d"
7. string.startswith('python')  #False
8. string.split()    #['Python','is','good']
9. len(string)  #14
10. string[30]   #报错
11. string.replace(" ", '')   #"Pythonisgood"
'''